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Code

PowerSaver: re-layouted code.

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No functional changes.
This commit is contained in:
Maarten ter Huurne 2011-10-23 06:56:01 +02:00
parent e73a8d06ea
commit ae685a9729
2 changed files with 67 additions and 64 deletions
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94
src/powersaver.cpp
View File

@ -1,34 +1,35 @@
#include "powersaver.h"
#include "debug.h"
#include <errno.h> #include <errno.h>
#include <fcntl.h> #include <fcntl.h>
#include <stdio.h> #include <stdio.h>
#include <string.h> #include <string.h>
#include <unistd.h> #include <unistd.h>
#include "powersaver.h" PowerSaver *PowerSaver::instance = NULL;
#include "debug.h"
PowerSaver* PowerSaver::instance = NULL; Uint32 screenTimerCallback(Uint32, void *) {
Uint32 screenTimerCallback(Uint32, void *) DEBUG("Disable Backlight Event\n");
{ PowerSaver::getInstance()->disableScreen();
DEBUG("Disable Backlight Event\n"); return 0;
PowerSaver::getInstance()->disableScreen();
return 0;
} }
PowerSaver* PowerSaver::getInstance() { PowerSaver *PowerSaver::getInstance() {
if ( instance == NULL ) { if (instance == NULL) {
instance = new PowerSaver(); instance = new PowerSaver();
} }
return instance; return instance;
} }
bool PowerSaver::isRunning() { bool PowerSaver::isRunning() {
return instance != NULL; return instance != NULL;
} }
PowerSaver::PowerSaver( ) { PowerSaver::PowerSaver() {
SDL_InitSubSystem(SDL_INIT_TIMER); SDL_InitSubSystem(SDL_INIT_TIMER);
setScreenTimeout(0); setScreenTimeout(0);
screenTimer = NULL; screenTimer = NULL;
} }
PowerSaver::~PowerSaver() { PowerSaver::~PowerSaver() {
@ -37,40 +38,40 @@ PowerSaver::~PowerSaver() {
instance = NULL; instance = NULL;
} }
void PowerSaver::setScreenTimeout( unsigned int seconds ) { void PowerSaver::setScreenTimeout(unsigned int seconds) {
screenTimeout = seconds; screenTimeout = seconds;
resetScreenTimer(); resetScreenTimer();
} }
void PowerSaver::resetScreenTimer() { void PowerSaver::resetScreenTimer() {
if ( screenTimer != NULL ) { if (screenTimer != NULL) {
SDL_RemoveTimer(screenTimer); SDL_RemoveTimer(screenTimer);
} }
addScreenTimer(); addScreenTimer();
//If display is off, turn on it // If display is off, turn on it.
if ( !screenState ) { if (!screenState) {
enableScreen(); enableScreen();
} }
} }
void PowerSaver::addScreenTimer() { void PowerSaver::addScreenTimer() {
//if timeout is zero, don't set timeout // If timeout is zero, don't set timeout.
if ( screenTimeout == 0 ) { if (screenTimeout == 0) {
screenTimer = NULL; screenTimer = NULL;
return; return;
} }
screenTimer = SDL_AddTimer(screenTimeout*1000, screenTimerCallback,NULL); screenTimer = SDL_AddTimer(screenTimeout * 1000, screenTimerCallback, NULL);
if ( screenTimer == NULL ) { if (screenTimer == NULL) {
ERROR("Could not initialize SDLTimer: %s\n", SDL_GetError()); ERROR("Could not initialize SDLTimer: %s\n", SDL_GetError());
} }
} }
#define SCREEN_BLANK_PATH "/sys/class/graphics/fb0/blank" #define SCREEN_BLANK_PATH "/sys/class/graphics/fb0/blank"
void PowerSaver::setScreenBlanking( bool state ) { void PowerSaver::setScreenBlanking(bool state) {
const char* path = SCREEN_BLANK_PATH; const char *path = SCREEN_BLANK_PATH;
const char* blank = state ? "0" : "1"; const char *blank = state ? "0" : "1";
int fd = open(path, O_RDWR); int fd = open(path, O_RDWR);
if (fd == -1) { if (fd == -1) {
@ -82,18 +83,17 @@ void PowerSaver::setScreenBlanking( bool state ) {
} }
close(fd); close(fd);
} }
screenState = state; screenState = state;
} }
void PowerSaver::enableScreen() { void PowerSaver::enableScreen() {
if ( !screenState ) { if (!screenState) {
setScreenBlanking(true); setScreenBlanking(true);
} }
} }
void PowerSaver::disableScreen() { void PowerSaver::disableScreen() {
if ( screenState ) { if (screenState) {
setScreenBlanking(false); setScreenBlanking(false);
} }
} }

37
src/powersaver.h
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@ -1,26 +1,29 @@
#ifndef POWERSAVER_H #ifndef POWERSAVER_H
#define POWERSAVER_H #define POWERSAVER_H
#include <SDL.h> #include <SDL.h>
class PowerSaver { class PowerSaver {
public:
static PowerSaver *getInstance();
static bool isRunning();
~PowerSaver();
void resetScreenTimer();
public: void enableScreen();
static PowerSaver* getInstance(); void disableScreen();
static bool isRunning();
~PowerSaver();
void addScreenTimer();
void resetScreenTimer();
void enableScreen(); void setScreenTimeout(unsigned int seconds);
void disableScreen();
void setScreenTimeout( unsigned int seconds ); private:
private: PowerSaver();
PowerSaver( ); void addScreenTimer();
static PowerSaver* instance; void setScreenBlanking(bool state);
bool screenState;
unsigned int screenTimeout; static PowerSaver *instance;
SDL_TimerID screenTimer; bool screenState;
unsigned int screenTimeout;
void setScreenBlanking( bool state ); SDL_TimerID screenTimer;
}; };
#endif #endif